Apparently Industrial Light and Magic is now inserting R2-D2 in every single movie they make. Before it was Star Trek, and according to film’s visual-effects supervisor Scott Farrar, now it is Transformers 2:
https://gizmodo.com/mystery-solved-this-is-where-r2-d2-is-in-star-trek-5286649
There’s an R2-D2 flying around in there somewhere. There’s a little bit of space junk thrown in there; see if you can find it. It’s a scene in the desert.
What’s next? Bar2-D2 serving cocktails to Tony Stark in Iron Man 2? Hopefully, yes. [VH1 via Star Wars Blog]
https://gizmodo.com/bar2d2-is-a-real-bar-robot-doesnt-carry-lightsabers-5122895